|Such a dangerous question to ask...|
...And I have several different answers to the question it poses.
1.) 23rd Century Prime Timeline solution
- Constitution Class Refit or Excelsior Class Refit for the Flagship. (I'd like to have both.)
- Miranda Class for the Cruiser.
- A few stolen Klingon Birds of Prey retrofitted with Starfleet technology for the 'fighters'.
2.) 24th Century Prime Timeline solution
- Galaxy or Sovereign Class Flagship. (I'd like to have both.)
- Nebula Class Cruiser.
- A whole fleet of Defiant Class 'Escort' ships for the fighters... (The Borg would be soooooo fucked if they attacked that base.)
3.) Mixed franchise solution
- A large carrier vessel like the Battlestar Galactica from NuBSG for the flagship.
- Galaxy or Sovereign Class for the Cruiser.
- A whole fleet of X-Wings from Star Wars for the fighters.